[mekoka]

> why everyone feels OS means you'll have the app forever.

Your hyperboles aside, I don't think there's much to prove. Maintained and long lasting forks abound. Enough to instill confidence in the principle.

If Figma was open source, there would be a fork right now and a team of contributors forming around it as we speak. That and a migration of a substantial part of its community.

> This isn't true in my experience.

Could you share, so that the naive optimist could at least have some context?